JPS60200671A - Outgoing controller - Google Patents

Abstract

PURPOSE:To perform data transmission, connection, maintenance and crime preventive watching and to enable the common use of an NCU section in a transmitter with an existing NCU by utilizing an AA type NCU (automatic outgoing and incoming type network controlling device) in CD using one circuit of subscriber's station by adding an additional function to an existing cash dispenser (CD). CONSTITUTION:An outgoing controlling device 7 is added to a cash dispenser (CD). For instance, when a data terminal DTE gives a starting signal b, a switching controlling circuit 22 connects a CTE4 MODEM3 and an AA type NCU8 and starts the NCU8. The NCU8 request telephone number to the DTE4, and the DTE4 sends back the telephone number of the center 11. The NCU8 sends the telephone number to an exchanger 9, and when the center makes a reply, a polarity inversion signal is inputted from the exchange 9 to the NCU8, and a data request signal is given from the NCU8 to an MODEM3 through the circuit 22, and data from the DTE4 are sent to the center 11 via a route of the MODEM3 and circuit 22. When a communication completion signal is sent from the center 11, the MODEM3 detects it, and the MODEM3 gives a circuit release signal to the NCU8 and releases the circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a transmission control device that controls a data transmission 1 call function and a maintenance/crime prevention monitoring function.

(Prior Art) Conventionally, as shown in Fig. 1, in a CD system, in addition to data transmission from a CD (cash dispenser) l to a host computer for input processing, a telephone or intercom communication by a user to make an appointment is required. There is one telephone line each for maintenance and crime prevention monitoring, such as monitoring the entrance and exit of users and the start-up of equipment. During operation, the DTE (data terminal) 4 is activated by the user's card insertion into the magnetic card league/customer operation unit 01 and key input, and the AA type NCU (automatic call/call type network control unit) is activated. A dial connection is made to a host computer 11 via an exchanger 9 via a modem 3 and an AA type NCU 3 for data transmission and processing. Therefore, if there is a delay due to unknown operation, etc., use the attached intercom 5 to contact the staff in the store, or use the telephone 6 to call the designated center telephone 12 to contact them, and contact them to activate the sensor 2. A preset monitoring light (center) is called via the radio transmitter 02 and the status on the ICD side is transmitted to the maintenance/crime prevention monitoring device 10. Therefore, three telephone lines had to be provided, and intercom communication was still limited to within the premises.

(Object of the Invention) In order to solve this drawback, the present invention adds additional functions to the existing carrier system (CD), thereby enabling the AA type NCU existing in the CD to be connected to a single telephone subscriber line.
(Automatic call/termination type network control equipment) is used to perform data transmission, communication, maintenance and security monitoring, and the system configuration is configured by sharing the NCU section in the transmitter with the existing NCU, making construction easier and taking less space. The purpose of the present invention is to provide a transmission control device that can secure the telephone line, improve the efficiency of telephone line utilization, and realize a low-cost system configuration.

(Structure and operation of the invention) The present invention will be explained in detail below.

Figure 2 is a system configuration diagram for explaining the basic functions of the device of the present invention, and 1 is a CD (cash dispenser).
, 2 is a maintenance/security sensor, 3 is a MOD EM (modulator/demodulator), 4 is a DTE (data terminal equipment), 5 is an intercom with a built-in call button, microphone and speaker, and 6 is a ringer speaker.

7 is a call control device which is the main part of the present invention;
is an AA type NCU (automatic call/termination type network control unit), 9 is a switchboard, 10 is a maintenance/security monitoring device that is the center device for sensor 2, 11 is a host computer that is the center device for MODEM 3 and DTE 4, and 12 is a bi-interphone. This is the center telephone, which is number 5.

The operation of this system will be explained with reference to an operation flowchart. In each flowchart, the same round bamboo numbers are interconnected.

(]) Operation of sensor 2 [see Figure 4 (a) Q))] For example, "If there is a user's magnetic card in the CDl
The case where the sensor 2 operates based on the information "Tsuda" is as follows [see FIG. 4(a)]. The transmission control device 7 outputs a start signal to the AA type NUC 8 (4-1). AA type NC
The U 8 manually sends a line busy signal to the transmission control device 7 to close the line, and requests the transmission control device 7 for telephone number data. The transmission control device 7 automatically selects a preset dial destination number in response to the transmission operation caused by the operation of the sensor 2, and transmits the telephone number data for connection to the maintenance/crime prevention monitoring device 10 to the AA type NCU 8. Output to (4
-2).

AA type NCU 8 follows the received phone number data.
Dial to exchange 9.

When the transmission control device 7 outputs a number information end signal to the AA type NCU 8, the AA type NCU 8 ends the dialing operation and waits for a response from the maintenance/crime prevention monitoring device 10. Maintenance·
When the crime prevention monitoring device 10 responds, a polarity inversion signal is inputted from the exchange 9 to the AA type NCU 8 and further inputted to the transmission control device 7. The transmission control device 7 restores the activation signal to the AA type NCU 3 when the polarity reversal signal is input manually.
-3), convert the contents of Seven-Li-2 into MF times the signal and convert it into AA
It is sent to the crime prevention monitoring device 10 through the type NCU 8 and the exchange 9 (4-4).

When the transmission control device 7 finishes transmitting the MF double signal, the transmission control device 7 transmits the AA signal.
Output a line release signal to type NCU3 4-5),
The AA type NCU 8 opens the line, and then the transmission control device 7
The line busy signal will be restored.

The maintenance/crime prevention monitoring device 10 opens the line when the MF double signal disappears.

Here, a case will be described in which the maintenance/crime prevention monitoring device 10 is in a busy state due to a report from another CD, for example.

The AA type NCU 8 waits for a response for 40 seconds, and if there is no response, the line is released and the line busy signal is restored to the transmission control device 7. Transmission control device 7d1AA type NCU3
(4=6).

Furthermore, since the contents of the sensor 2 could not be sent out, the activation signal is again output to the AA type NCU 3 after one minute (4-7) (4-1). The AA type NCU 8u dials and calls the maintenance/crime prevention monitoring device 1o.

If the maintenance/crime prevention monitoring device 10 does not respond, the AA type NCI
Output the line release signal to J8 4-5), AA type NCU
3 releases the line after 40 seconds, and also restores the line busy signal to the transmission control device 7.

Since the transmission control device 7 could not transmit the contents of 7/2, it outputs the activation signal to the AA type NCU 8 again after one minute (4-1). The AA type NCU 3 performs a dialing operation to call the maintenance/crime prevention monitoring device 10. If the maintenance/crime prevention monitoring device 10 does not respond, the AA type NCU 8 releases the line after 40 seconds and also restores the line busy signal to the transmission control device 7.

When the number of times the call has been made reaches 3, the call control device 7 outputs an activation signal to the AA type NCU 3 after 10 minutes (4-8) (4-1). In this way, the transmission control device 7 outputs a measurement activation signal to the AA type NCU 3 until the contents of the sensor 2 are sent to the maintenance/crime prevention monitoring device 10.

(2) Operation of the DTE 4 [See FIG. 5] Next, the case where data is sent to the host converter 11 will be described. When the activation signal is input to the transmission control device 7 from the DTE 4 (5-1), the transmission control device 7 activates the DTE 4.
AA type NCU 8.
Connect the signal line to MODEM 3 and DTE 4 (5-2). The AA type NCU 3 outputs a line busy signal to the transmission control device 7 and the DTE 4 (5-3), and after the line is closed, requests telephone number data from the DTE 4 via the transmission control device 7. The DTE 4 outputs a telephone number for connecting the host converter 11 to the AAWNCU 8 . The AA type NCU 3 dials the exchange 9 according to the received telephone number data.

When the DTE 4 outputs a number information end signal to the AA type NCU 3, the AA type NCU 3 ends the dial link operation and waits for a response from the host computer 11.

The host computer 11 responds, and a polarity reversal signal is manually transmitted from the exchange 9 to the AA type NCU 8, and the transmission control device 7
A data request signal is input to MODEM3 via
, data is transmitted from the DTE 4 to the host computer 11 via the MODEM 3. When the data communication ends, the host computer 11 sends MODF:
A data communication end signal is sent to M3.

When MODEM 3 receives the data communication end signal, A
Outputs a line release signal to A-type NCU 8, and AA-type NCU
3 releases the line and also restores the line busy signal to the transmission control device 7. The transmission control device 7 detects the recovery of the line busy signal and transmits the signal to the AA type NCU 3 and the MODEM 3.
, restore the connection of DTE 4 (5-4).

(3) Operation of intercom 5 [see Figure 6 (→ (b) 9)
Next, when the user presses the call button of Innotarho 15 (6
-1), the extension/external line mode selector switch provided on the intercom main phone 6 (extension mode debug coupon 5
and the intercom main phone 6 (means a call between 0 and 0.External line mode means a call between the intercom 5 and the center telephone 12). The control device 7 detects that the call is from the intercom 5 and calls the AAmNCU.
8 (6-2), and a call confirmation sound is output to the speaker of the intercom 5 (6-3).

Next, the AA type NCU 3 closes the line and requests telephone number data from the transmission control device 7. The call control device 7 transmits telephone number data of the center telephone 12 set in advance in response to a call operation using the call button of the intercom 5 to AA.
Output to type NCU3 (6-4).

The AA type NCU 3 dials the exchange 9 according to the received telephone number data. When the transmission control device 7 outputs the number information end signal to the AA type NCU 3, the 'I
The AA type NCU 3 ends the dialing operation and waits for a response from the center telephone 12. When the center telephone 12 responds, a polarity reversal signal is input from the exchange 9 to the AA type NCU 3 and also to the transmission control device 7.

When the polarity reversal signal is manually input, the transmission control device 7 restores the activation signal to the AA type NCU 3 (6-5), and further,
The call confirmation sound output from the speaker of the intercom 5 is stopped (6-6), and a communication path is established between the intercom 5 and the center telephone 12 (6-7). By forming the communication path, a communication between the intercom 5 and the center telephone 12 is performed.

To end the call, after hooking down the center telephone 12, the origination control device 7 detects a busy tone from the exchange 9 and outputs a line release signal to the AAfflNCU 8.
-8), AA type NCU 8 releases the line.

In addition to the method of detecting the busy tone described above, there are two ways to end a call: (1) If a push-button dial telephone is used as the center telephone 12, an MF multiplied signal can be sent.
A method for detecting with the F-fold signal transmission control device 7 and opening the line,
(2) A method in which a single-frequency oscillator is acoustically coupled to the center telephone 12, the transmitted single-frequency signal is detected by the transmission control device 7, and the line is released; (3) the communication path formation time is counted by the transmission control device 7. However, there is a method of opening the line after a certain period of time (for example, 5 minutes) has elapsed.

Here, a case will be described in which the center telephone 12 does not respond to a report from another CD, for example.

The AA type NCU 8 waits for a response for 40 seconds, and if there is no response, it releases the line, and also restores the line busy signal to the transmission control device 7, and the transmission control device 7 stops the call confirmation sound to the intercom 5. (6-9).

Next, when the extension/external line mode switch of the intercom main phone 6 is set to the internal line mode, when the call button of the intercom 5 is pressed (6-1), the calling control device 7 detects the internal line mode and The confirmation ring tone is output to the speaker of the intercom 5 and the ring tone speaker of the Innotarphone master telephone 6 (6-10). When the intercom master telephone 6 is turned 7°, the transmission control device 7 stops the confirmation ring tone (6-11) and forms a communication path between the intercom 5 and the intercom master telephone 6 (6-12). .

When the call control device 7 detects the hook-down of the intercom master telephone 6, the end of the call is detected, and the call path is restored (6-13).

(4) Operation during simultaneous input [See Figure 7] When the transmission control device 7 is set to the outside line mode, the sensor 2,
When the activation signal is simultaneously input from the DTE4 and the intercom 5, the speech is stopped according to the CPU processing timing.4-
Issei Ichigoko ~ Kogosho 4! Process in the order of two and one octopus. 1
When one process is being performed, a signal indicating that the line is in use is input from the AA type NCU 8 to the transmission control device 7, and the transmission control device 7 retains the operation from other terminals.
After waiting for the line from 8 to become available, the next line is connected in sequence, and communication is performed.

Next, when activation signals are simultaneously input from the station 2, DTE 4, and intercom 5 while the transmission control device 7 is set to the extension mode, the transmission control device 7 connects the intercom 5 and the intercom parent in the same manner as described above. At the same time as forming a communication path for the telephone 6, the rDTE4 → 纺い! according to the CPU processing timing. Process in the same manner as above in order of Noguchi.

As mentioned above, using one line, 3
Data communications or voice calls are made to the location.

FIG. 3 is a diagram showing the internal functions of the transmission control device 7 as an embodiment of the device of the present invention. In this embodiment, the functions of each part are as follows.

13 is a switching control at1 in response to an input signal from sensor 2.
22, output a sensor signal to the sensor MF signal conversion circuit 15 when the polarity inversion signal corresponding to the activation signal a is returned as in the above operation, or output the sensor signal to the sensor MF signal conversion circuit 15 as described above. This is a sensor input control section that reads telephone number data from the telephone number storage section 14 of the maintenance/crime prevention monitoring device when performing a dial operation.

14 is a maintenance/crime prevention monitoring device telephone number storage unit that stores the telephone number of the maintenance/crime prevention monitoring device 10 in advance.

15 is a sensor input MF signal conversion circuit that receives the sensor signal from the sensor input control unit 13 and converts it into an MF multiplied signal (two-frequency signal).

16 outputs a start signal C to the switching control circuit 22 in response to an input signal from the call button 5-1, outputs a ring tone generation control signal to the ring tone generation circuit 19, and operates the dial as described above. Sometimes the center telephone telephone number storage section 17
This is an intercom control unit that reads telephone number data from the telephone number and outputs a call end signal when the call end detection filter circuit 18 detects a busy tone from the exchange 9.

Reference numeral 17 denotes a center telephone number storage section in which the telephone number of the center telephone 12 is stored in advance.

Reference numeral 18 denotes a call termination detection filter that detects a busy signal from the exchange 9.

Reference numeral 19 denotes a ring tone generation circuit that generates a confirmation ring tone in response to a ring tone generation control signal from the intercom control unit 16.

20C, amplify the voice from the microphone 5-2 of the intercom 5, or use the voice of the other party (the center telephone 12 or the intercom main telephone 6), or the confirmation ring tone from the raw circuit 19 to generate the ring tone. This is a hands-free telephone circuit that outputs peaker 5-2/X.

21 is an extension line mode switching switch of the intercom main telephone 6, and depending on the state of the signal of Chiro a, the internal line mode (a mode in which the input 2LA and the output 21B are mutually connected in order for the intercom 5 and the intercom main telephone 6 to make a call) or an outside line mode (a mode in which the human power 21A and the output 21C are mutually connected in order for the intercom 15 and the center telephone 12 to make a call).

22 is an activation signal a from the processor input control section 13;

Activation signal from DTE 4, intercom control unit 16
This is a switching circuit control unit that performs a switching connection that identifies the activation signal C from the terminal and outputs only the signal that arrives first.

23 is a power supply circuit that includes a built-in battery as a countermeasure against power outage.

Next, the operation of this embodiment of the transmission control device 7 will be explained.

0) When the sensor 2 operates When the sensor 2 operates, an activation signal is input to the sensor input control section 13. When the activation signal a is input to the switching circuit control unit 22 from the sensor input control unit 13, the activation signal is outputted from the sensor input control unit 13 to the AA type NCU 8, and the line is connected via the AA type NCU 8. will be carried out. The AA type NCU 8 closes the line and requests the sensor human control unit 13 for telephone number data. The processor input control section 3 reads telephone number data from the maintenance/crime prevention monitoring device telephone number storage section 14 and outputs it to the AA type NCU 8. The AAWNCU 8 dials the exchange 9 according to the given telephone number data, and upon receiving the dial end signal data, finishes dialing and waits for a response from the maintenance security monitoring device 10. When the maintenance crime prevention monitoring device 10 responds, a polarity reversal signal is given from the exchange 9 to the AA type NCU 3, and when that signal is manually inputted to the control input control section 13 via the switching circuit control section 22, the sensor is enabled. The configured sensor signal is transferred from the sensor input MF signal conversion circuit 15 to the MF
The doubled signal is output to the switching control circuit 22, and the AA type NCU
3 and exchange 9 to the maintenance security monitoring device IO. When the transmission of the sensor signal is completed, a line release signal is given from the sensor input control unit 14 to the AA type NCU 8 to release the line. The crime prevention monitoring device 10 opens the line when the MF double signal disappears.

Similarly to the above, if the AA type NCU 8 dials and calls the sexual monitoring device 10 for 40 seconds in the busy state, but there is no response, the AA type NCU 8 releases the line and switches the switching control circuit 22. Sensor input control section 13. When the sensor input MF signal conversion circuit 15 is restored and one minute elapses, the activation No. 48 a is manually inputted from the sensor input control section 13 to the switching circuit control section 22, and the AA type NCU 8 performs a dialing operation and performs maintenance and maintenance. Wait 4 seconds for the crime prevention monitoring device 10 to respond 9 - A response is sent in the same manner as described above. If the maintenance/crime prevention monitoring device 10 does not respond even after this, the angle AA type NCU 8 performs a dialing operation after a one-minute pause and waits for 40 seconds for the maintenance/crime prevention monitoring device 10 to respond. So far, we have made three calls, but even this is still enough for 10 maintenance/crime prevention monitoring devices.
If there is no response, the calling operation is performed again after 10 minutes have elapsed.

(b) When a start signal is input from the DTE 4 When the DTE is operated and started, the start signal from the DTE 4 is input to the switching circuit control section 22, which identifies it and controls the switching control circuit 2.
2 is DTE4- MODEM 3 and AA type NCU 8
and start up AA type NCU 8.

AA type NCU 8 closes the line and requests telephone number data from DTE 4.

DTE4 is the host converter 11 stored in the DTE.
outputs the telephone number data to the AA type NCU 8.

The AA type NCU 8 dials the exchange 9 according to the given telephone number data, and when it receives the end-of-dial signal data, it ends the dialing and waits for a response from the host computer 11. When the host computer 11 responds, a polarity inversion signal is input from the exchange 9 to the AA type NCU 3, a data request signal is given from the AA type NCU 8 to the MODEM 3 via the switching control circuit 22, and the D T
Data from E4 is MODEM3.

It is connected to the host computer 11 via the switching control circuit 22 and performs data communication. When the communication end signal is sent from the post computer 11, it is detected by the MODEM 3, and the MODEM 3 gives a line release signal to the AA type NCU 3 to release the line. Similar to when the sensor 2 is operating, if the AA type NCU 8 dials and calls the host converter 11 for 40 seconds in a busy state and there is no response, the AA type NCU 8 opens the line and calls the switching circuit controller. 22. And restore MODEM3 and DTE4. The retransmission operation is performed if there is a start signal from the DTF 24. At this time, data communication is performed by operating the DTE4 again.

(C) When the call button 5a of the intercom 5 is pressed When the call button 5a is pressed, the intercom control unit 16
It takes a while to start up.

Here, when the intercom mode setting switch 6a is set to the extension mode (a mode in which a call is made between the intercom 5 and the intercom master telephone 6), a ring generation control signal is given from the intercom control section 16 to the ring tone generation circuit 19. At the same time, a confirmation ring tone is output from the speaker 5b of the intercom 5 through the free phone circuit 20, and at the same time, a confirmation ring tone is output from the built-in speaker to the intercom telephone 6b through the intercom extension/external line switching circuit 21. When you pick up the handset of the intercom telephone 6b, the intercom control unit 16 makes a ``fu'' sound.

When the tap is detected, the confirmation ringing tone stops, and a communication path is established between the intercom 5 and the intercom master telephone 6, and a conversation can be made. By hanging up the receiver of the intercom telephone 6b, the call is terminated and restored.

Next, switch the internal/external line mode switch and Chiro a to external line mode (
A case will be explained in which the ink-pong 5 and the center telephone 12 are set to a mode in which a call is made. When the call button 15a is pressed, the intercom control unit 16 is activated, a ring tone generation control signal is input from the intercom control unit 16 to the ring tone generation circuit 19, and a confirmation ring tone is sent to the intercom 5 through the free telephone circuit 20. is output through the speaker. (Note that since it is in outside line mode, no confirmation ring tone is output to the intercom main phone 6 by the intercom extension/external line switching circuit 21.)
At the same time, the activation signal C from the intercom control unit 16 identifies that the intercom 5β connection is off, connects the intercom control unit 16 and the AA type NCU 8, and connects the AA type NCU 8.
U 8 requests telephone number data from intercom control section 16 . The intercom control unit 16 reads telephone number data from the safety telephone telephone number storage unit 17 and selects the AA type NC.
Output to U8. AA type NCU3keJ5gura h-fr
It dials Imayoba q according to the Tomiwa number data, and when it receives the end-of-dial signal data, the dialing ends and it waits for a response from the telephone 12. Center telephone 12
When the answer is received, a polarity reversal signal is sent from the exchange 9 to the AAmNCU 8, and when it is manually input to the intercom control unit 16, the confirmation ring is stopped by a ring tone generation control signal,
The intercom 5 is connected to the AA type NCU 8 through the hands-free telephone circuit 20 and the intercom internal/external line switching circuit 21.
and the center telephone 12 to make a call.

When the call ends, 7. on the center telephone 12. Due to the downtime, a busy tone is sent from exchange 9, and the AA type NCU
8. The busy tone is detected by the call end detection filter circuit 18 through the intercom extension/external line switching circuit 21,
A line release signal is given from the intercom control unit 16 to the AA type NCU 3 to release the line.

Next, when the transmission control device 7 is set to the outside line mode, when activation signals are simultaneously input from the sensor 2, DTE 4, and intercom 5, the activation signals are selected and operated in the order according to the CPU processing timing.

When the call control device 7 is set to the extension mode, if activation signals are simultaneously input from the sensor 2 , DTE 4 , and intercom 5 , the interphone 5 and the interphone master telephone 6 are activated in the same way as when the intercom 5 operates. At the same time, the communication path is selected and processed according to the timing of CPU processing.

Next, a specific example of the switching circuit control section 22 will be explained with reference to FIG. In the figure, oscl is an oscillator, C1 is a counter, Dl is a decoder, G1 to G12 are gates,
FF1 to FF3 are flip-flop circuits, A, B,
C is a relay, a, b, c are each contact, TK is AA
Detecting the fall of the line in use signal sent from type NCU3, the Frisoge flop circuits FFI and FF2
, FF3 is a falling detection circuit that sends a reset signal to FF3.

The operation of this specific example will be explained. The clock pulses generated by the oscillator OSCI are input to the counter C1 through G12. The output of the counter C1 is input to the decoder Dll'l:, and the output of the decoder D1 is applied to the gate G7. The timing of opening the gates G8, G9, G9, G8, G9, G8, G9, G8, G9, G8, G9, G8, G9, G8, G9, G9, G8, G8, G9, etc. are ordered. In this state, for example, when the activation signal a is input from the sensor 2, the goo G7
The output sets FF1, FF1, and activates relay A. The output of FFI is GLL and gate G12, and the input of black and pulse to counter C1 is prohibited. In this state, even if the start signal or start signal C is manually applied, the gate G8.
Since gate GIO is closed, flip-flock F
F2, FF3 are not hit. When relay A operates, contact a closes, gates Gl and G2 open, and sensor 2 and AA type NCU 8 are connected. AA type NCU 8
When the sensor 2 is connected, the AA type NCU 3 sends a line-in-use signal to the switching circuit control section 22, and performs a series of operations.

When the series of operations is completed, the line busy signal from the AAmNCU 8 is restored, and the falling signal is detected by the falling detection circuit TK, and the flip-flop FFI is reset. As a result, relay A is restored, contact a is also restored, Gl and G2 are closed, and the connection with AAmNCU8 is released. Also, the output from gate Gll causes G
12 is opened, the counter C1 is manually powered again, and the counter C1 returns to the standby state.

The same operation as above is performed when the start signal is input manually.

When the activation signal C from the intercom 5 is input,
When the external line mode is set by the internal line/external line mode switching switch, Ciro a, C9 opens and performs the same operation as when the activation signal a is input.

As explained below, if the transmission control device according to the present invention is used, one telephone line can perform 9 data transmission calls, maintenance and crime prevention monitoring, and has the advantage of being able to use the telephone line efficiently. .

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an example of the configuration of a conventional carrier dispenser, Fig. 2 is a block diagram for explaining the present invention in detail, and Fig. 3 is a block diagram showing an embodiment of the present invention. , Fig. 4 (b), Fig. 5, Fig. 6 (a), (b) and Fig. 7 are flowcharts for explaining the present invention in detail, and Fig. 8 shows the switching circuit control used in the present invention. This is a professional diagram showing an example of the section. Patent applicant: Iwasaki Tsushinki Co., Ltd. Representative: Otsuka, 1 external person

Claims (1)

[Claims] In a data terminal device incorporating a network control device for one subscriber telephone line, data transmission information, telephone contact information, and maintenance/crime prevention monitoring information are accommodated in corresponding data inputs, intercom inputs, and sensor inputs, respectively, The data input, the intercom human input, and the sensor input are provided with a function that outputs only the earliest input among the three inputs while that input exists, and prohibits output output of other inputs while that input exists. A calling control device, characterized in that it is configured to be connected to a network control device for one subscriber telephone line via a switching means having a switching device.